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Model-Based Approaches in Developing an Advanced Aftertreatment System: An Overview
ISSN: 2641-9637, e-ISSN: 2641-9645
Published January 15, 2019 by SAE International in United States
Citation: Su, C., Brault, J., Munnannur, A., Liu, Z. et al., "Model-Based Approaches in Developing an Advanced Aftertreatment System: An Overview," SAE Int. J. Adv. & Curr. Prac. in Mobility 1(1):201-214, 2019, https://doi.org/10.4271/2019-01-0026.
Cummins has recently launched next-generation aftertreatment technology, the Single ModuleTM aftertreatment system, for medium-duty and heavy-duty engines used in on-highway and off-highway applications. Besides meeting EPA 2010+ and Euro VI regulations, the Single ModuleTM aftertreatment system offers 60% volume and 40% weight reductions compared to current aftertreatment systems. In this work, we present model-based approaches that were systematically adopted in the design and development of the Cummins Single ModuleTM aftertreatment system. Particularly, a variety of analytical and experimental component-level and system-level validation tools have been used to optimize DOC, DPF, SCR/ASC, as well as the DEF decomposition device. The highlights of this work can be summarized as follows: a). internal dosing is more efficient than external dosing to control HC slip; High CPSI DOCs show better HC oxidation performance at high SV due to enhanced mass transfer; b). the adopted advanced DPF technologies enable greater ash capacity for long maintenance intervals; c). SCR performance was optimized with the use of a hydrothermally robust Cu-Zeolite catalyst coated on high CPSI substrates.